– 1/2 cup unsalted butter, softened – 1 cup peanut butter – 1/2 cup brown sugar – 1/2 cup white sugar – 2 large eggs – 1 tsp vanilla extract – 1 1/2 cups old-fashioned oats – 1 tsp baking soda – 1/4 tsp salt – 3/4 cup M&Ms – 3/4 cup semisweet chocolate chips – Optional: chopped nuts, pretzels, or raisins
Cream together butter, peanut butter, brown sugar, white sugar, eggs, and vanilla until smooth and fluffy. This forms the cookie base.
Stir in oats, baking soda, and a pinch of salt. These ingredients give the cookies their hearty texture and perfect chewy structure.
Fold in chocolate chips, M&Ms, and any other favorite add-ins like chopped nuts or pretzel bits for crunch and color.
Scoop dough into 2-inch balls and place on a lined baking sheet. Leave space between each to allow for even spreading as they bake.
Bake at 350°F for 10–12 minutes until edges are golden but centers are soft. Let them cool on the tray for 5 minutes before transferring.
Perfect for parties, lunchboxes, or late-night cravings, Monster Cookies are a crowd-pleasing classic with endless variation options.